Bitcoin mining requires a lot of energy. So anyone who wants to set up a mining farm will try to set it up in a place where electricity price is relatively cheap and mining equipment is available at low prices. That's why most the miners prefer places like China, Cyprus where electricity prices are relatively low.
This is the correct answer.
As we can see in the chart below, the electricity cost per Kwh in USA is about 50% higher than China.
https://www.ovoenergy.com/guides/energy-guides/average-electricity-prices-kwh.html
I don't know why we don't have many miners in India, where it is also cheap. But I think China has one additional advantage: They have some of the biggest hydro plants in the world. Energy is probably much cheaper near those hydro plants.
I don't see how this answer is correct. First of all it answers something else. It doesn't answer why nobody else except the Chinese are manufacturing ASIC equipment for Bitcoin mining. Secondly, it states that Cyprus has relatively low electricity, while in fact it has one of the highest costs of electricity in the European Union.
https://www.stockwatch.com.cy/en/article/energeia/cyprus-ranks-7th-most-expensive-electricity-market